/**
 * Project Name:MyTookit
 * Package Name:com.xuwei.utils.db
 * author:David
 * Date:2016年6月1日下午3:27:35
 * Copyright (c) 2016, xw123box@126.com All Rights Reserved.
 *
 */
package com.xuwei.utils.db;
import java.io.InputStream;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.Properties;
/**
 * @author David
 * @since 2016年6月1日 下午3:27:35
 * @version 
 * @since JDK 1.6
 */
public class JdbcUtil {
	private static String className;
	private static String url;
	private static String user;
	private static String password;
	static{
		try {
			InputStream in = JdbcUtil.class.getClassLoader().getResourceAsStream("dbinfo.properties");
			Properties props = new Properties();
			props.load(in);
			className = props.getProperty("className");
			url = props.getProperty("url");
			user = props.getProperty("user");
			password = props.getProperty("password");
			Class.forName(className);
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
	/**
	 * 获得数据库连接
	 * @return
	 * @throws Exception
	 */
	public static Connection getConnection() throws Exception{
		return DriverManager.getConnection(url,user,password);
	}
	/**
	 * 释放连接
	 * @param rs
	 * @param stmt
	 * @param conn
	 */
	public static void release(ResultSet rs,Statement stmt,Connection conn){
		if(rs!=null){
			try {
				rs.close();
			} catch (SQLException e) {
				e.printStackTrace();
			}
			rs = null;
		}
		if(stmt!=null){
			try {
				stmt.close();
			} catch (SQLException e) {
				e.printStackTrace();
			}
			stmt = null;
		}
		if(conn!=null){
			try {
				conn.close();
			} catch (SQLException e) {
				e.printStackTrace();
			}
			conn = null;
		}
	}
}
